* reload1.c (compute_use_by_pseudos): Allow reg_renumber[regno] < 0

        after reload.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@24287 138bc75d-0d04-0410-961f-82ee72b054a4

1 files changed, 14 insertions, 4 deletions

diff --git a/gcc/reload1.c b/gcc/reload1.c
index dca868526d7..5f1e7b9ba4f 100644
--- a/gcc/reload1.c
+++ b/gcc/reload1.c
@@ -536,10 +536,20 @@ compute_use_by_pseudos (to, from)
        int r = reg_renumber[regno];
        int nregs;
        if (r < 0)
-	 abort ();
-       nregs = HARD_REGNO_NREGS (r, PSEUDO_REGNO_MODE (regno));
-       while (nregs-- > 0)
-	 SET_HARD_REG_BIT (*to, r + nregs);
+	 {
+	   /* reload_combine uses the information from
+	      basic_block_live_at_start, which might still contain registers
+	      that have not actually been allocated since they have an
+	      equivalence.  */
+	   if (! reload_completed)
+	     abort ();
+	 }
+       else
+	 {
+	   nregs = HARD_REGNO_NREGS (r, PSEUDO_REGNO_MODE (regno));
+	   while (nregs-- > 0)
+	     SET_HARD_REG_BIT (*to, r + nregs);
+	 }
      });
 }